The problem is with the oni ui 7 carrier support i think, if they fix this bug ... it should work ... let's see how much time samsung takes

Be*

Can't remember the date man, beginning of July may, it was the one ui first release i remember...

Have the same problem with my samsung m35 5g phone too, tried everything mentioned in the comments, the problem is with the latest update itself, only samsung can fix it with a update... tried with sim interchange, new sim by updating the sim to late...